A question about the beginning of WoK

[Rushu42 Soulcaster]

I was rereading the start of The Way of Kings, and a sentence caught my eye. It was during the chapter from Cenn's perspective, when Kaladin and Dallet are discussing a lighted officer who had just come onto the battlefield.

"Kaladin turned toward Dallet. 'That's one of Hallaw's officers. He might be the one.'" (Page 34.)

Does anyone know what he meant by that? I think I'm missing something. I initially thought that he just meant that killing the brightlord would get his squad to the Shattered Plains, but that doesn't make sense with what comes next.

"'You don't know that, sir.'

'Regardless, he's a battalionlord. If we kill an officer that high, we’re all but guaranteed to be in the next group sent to the Shattered Plains. We’re taking him.'"

So what does he mean by "the one", then? What have I forgotten?

[Invocation Mistborn]

It's just spoken shorthand for them getting sent to the Shattered Plains, I think. The one that finally tips the scales. The last sentence is probably just a clarification for first-time readers.

[CosmicSieve Forescout]

I wondered if Kaladin meant the one who had killed Tien. Wasn't that the same Highprince's army as four years ago? I don't have my book handy to double check. 

[Scion of the Mists Forger]

On 7/20/2019 at 1:41 AM, CosmicSieve said:

I wondered if Kaladin meant the one who had killed Tien. Wasn't that the same Highprince's army as four years ago? I don't have my book handy to double check. 

That was my assumption too.  

[Karger Unmade]

On 7/19/2019 at 9:56 PM, Rushu42 said:

"Kaladin turned toward Dallet. 'That's one of Hallaw's officers. He might be the one.'" (Page 34.)

It could just be the one that they were promised a promotion for killing.